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BR–42
PRECAUTIONS
1. The ABS system has a self-diagnosis function. The ECU memorizes abnormality as diagnosis codes
which are occurring at present or occurred in the past.
Memorized diagnosis codes are erased when the power supply is disconnected. Therefore, be sure to
read out diagnosis codes before starting any operations.
CAUTION:
·
Be sure to read out diagnosis codes of the EFI system before disconnecting the power supply.
Failure to observe this caution will erase memorized diagnosis codes.
2. The components of the ABS system are precise and delicate. Therefore, never apply any excessive im-
pact during the removal, inspection and installation.
CAUTION:
·
Never use components to which an impact is applied by dropping or hitting with other objects.
3. Never perform the inspection of the ABS system when the vehicle is wet, such as after running in rain or
snow and after washing, in order to prevent water or dust, etc. from being admitted into the ABS and re-
lated connectors.
4. Never allow water and dust, etc. to enter into the ABS and related connectors.
5. Never allow water, etc. to come in contact with the ABS components installed in the cabin and their
connectors.
6. Prevent water from coming in contact with the ABS related parts and connectors during washing.
7. Prior to replacing the ABS ECU, thoroughly perform the trouble shooting for possible items other than
the ABS ECU. The ABS ECU is a reliable, but an expensive part.
Even when the ABS ECU is replaced according to the check results of the trouble shooting and the rele-
vant trouble has been remedied, be sure to reinstall the old ABS ECU so as to confirm that the malfunc-
tion was obviously caused by the faulty ABS ECU.
8. Never try to remove the ABS ECU cover and touch the screws on the ABS ECU proper.
9. Ensure that the components of the brake system are installed properly and so that no brake fluid leak-
age exists before performing the trouble shooting of the ABS.
10. Ensure that no excessive rattle exists on each of the wheel bearings before performing the trouble
shooting of the ABS.
11. When installing a wireless installation (HAM, CB, Telephone, etc.) :
The ABS ECU has been so designed that it is resistant to external influence.
However, if a vehicle is equipped with a wireless installation, such as CB, HAM, telephone and so forth,
(even if its output is only 10 W) it may affect the ABS ECU adversely. Therefore, observe the following
precautions.
·
Install the antenna at a place as far away as possible from the ABS ECU and related harnesses.
·
The antenna cord should be kept at least 30 cm from the ABS ECU and its related harnesses.
·
The antenna cord should not be routed in parallel to ABS related harnesses.
·
Adjust the antenna output correctly.
·
Never install a wireless installation with a high output into the vehicle.
·
Never use or place a handy telephone near the components of the ABS and its related harnesses.
12. When disconnecting or connecting connectors:
·
Prevent dust, water and foreign material, etc. from being admitted into the ABS related connectors
when disconnecting or connecting the connectors. Failure to observe this caution may cause seri-
ous malfunction, due to lowering the insulation of each terminal.
·
Never damage or lose the gasket or seal of connectors during disconnection or connection.
·
Be sure to confirm the shape of the lock and release the lock properly before disconnecting the
connectors.
·
Never damage the rubber protector of connectors during disconnection or connection.
JABS00006-00000
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